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need help asap bad at math?
) Stanford Binet IQ scores have a mean of 100 and a standard deviation of 16. IQ scores are roughly normally distributed.
(a) Sketch the normal curve, and label everything appropriately using the Empirical Rule, z-scores, and data values with the appropriate IQ scores.
(b) If a person's IQ has a z-score of −0.3, then explain what that tells you about how the person's IQ
compares to other people's IQ.
(c) A person has an IQ of 82. Find the z-score for this IQ score, and explain exactly what it tells you about how this person's IQ compares to other people.
(d) To have an "unusually high" IQ, a person would need to have an IQ with a z-score of 2 or more. How high would a person's IQ need to be to be considered "unusually high?" Show your work.
(e) Albert Einstein had an estimate IQ of 160. Convert Einstein’s IQ score to a z-score (show your work). What does the z-score tell us about Albert Einstein’s IQ? Is it unusual?
1 Answer
- charlatanLv 73 years ago
mean = 100
mean + 3 sigma = 148
mean - 3 sigma = 52
assume a sample size of =3000 (this gives a value 10 for each score)
x axis for sample,y-axis for io score
erect a perpendicular at 1500
put a fireman's hat at the top and that will give you
normal distribution curve.
i think i have helped you more than necessary.
good luck and all the best.